Configurable product grid modification - addition of custom attribute

I'm currently filling up and customizing a Magento store for our company. Because we have quite some configurable products we prefer a grid view instead of the standard Magento view for configurable products. We purchased the Magento mechanics grid for configurable products, but we need a simple modification. Magento mechanics, developper of the extension replies this week, 'sorry we're too busy to handle custom requests', which is a bit bizarre and a lack of support to me. Anyway, I'm looking for someone who can add an extra attribute to product grid which is called "eenheid" (means unit) to show my base selling unit. It is a fairly simple job, only a slight modification of the [login to view URL] file of the Magento mechanics extensions, but I'm not a programmer... Any one who could this job for a reasonable price? I've attached a jpg of what my grid should look like...